Hannah O'Hagan, MD
NPI 1942056643 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hannah O'Hagan, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1942056643).
Provider details
- NPI number
- 1942056643
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 125.083594 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-04-24
- Last updated
- 2024-08-11
- Certified
- 2024-08-11
Frequently asked questions
- What is Hannah O'Hagan's NPI number?
- Hannah O'Hagan's National Provider Identifier (NPI) is 1942056643, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hannah O'Hagan's specialty?
- Hannah O'Hagan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hannah O'Hagan located?
- Hannah O'Hagan's practice location on file with NPPES is 5841 S Maryland Ave Ste Mc7082, Chicago, IL 60637-1465.
- What is Hannah O'Hagan's phone number?
- The practice phone number listed in the NPPES registry for Hannah O'Hagan is (773) 702-6840.
- Does Hannah O'Hagan accept Medicare?
- Hannah O'Hagan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hannah O'Hagan's NPI active?
- Yes — Hannah O'Hagan's NPI (1942056643) is active in the NPPES registry as of the last update on 2024-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.